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KMID : 1059520070510020147
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Journal of the Korean Chemical Society
2007 Volume.51 No. 2 p.147 ~ p.153
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Simple and Selective Flow Injection Catalytic Determination of Ruthenium with Spectrophotometric Detection
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Behzad Rezaei
Najmeh Majidi
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Abstract
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A simple, selective and highly sensitive flow injection catalytic method was presented for determination of ruthenium based on its catalytic effect on the oxidation of pyronin B by periodate in pH=1.0. The reaction rate is controlled specrophotometricaly by monitoring the dye absorbance at 555 nm. The optimized conditions make it possible to determine ruthenium in the ranges of 0.1-10.0 ng/mL (r2=0.9982) and 10.0-50.0 ng/mL (r2=0.9934) with a detection limit of 0.04 ng/mL and a sample rate of 30±5 samples/h. Relative standard deviation for the results of five replicate measurements does not exceed 1.44%. The proposed method has been successfully applied for quantitation of ultra trace amounts of ruthenium in some environmental and biological samples.
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KEYWORD
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Ruthenium, FIA, Spectrophotometry, Pyronin B, Catalytic Determination
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